Newegg has Kingston SSDNow V100 SV100S2/64GZ 2.5" 64GB SATA II Internal
Solid State Drive for $88 after rebate. It's $118 before rebate with free
shipping (plus possible tax). Link: http://www.newegg.com/Product/Product.aspx?Item=N82E16820139415
It uses the JMicron JM618 controller, so not as fast as some of the newer
chipsets, but $1.375 per GB seems pretty good these days.